清代甘肃黄土高原的土地利用

作者： 刘维   来源： 陕西师范大学 年份： 2009 文献类型 ： 学位论文 关键词： 清代   农业技术   土地制度   甘肃黄土高原   土地资源  

描述： ainly chooses three aspects, the quantity and quality of farmland, the land system and agricultural technology, to analysis the fact that the land system, the land utilization patterns and the selection of agricultural technology are constrained by natural environment and land resources, accordingly reveal the main-land relationship which is influenced by natural environment. The thesis is composed of four parts.

全文：本文从历史地理学的角度,探讨自然环境影响下的土地资源与土地利用和土地制度的关系。通过对甘肃黄土高原清代土地数量、质量和类型、土地制度以及农业技术选择的认识,分析说明了土地制度、土地利用方式以及

清代甘肃黄土高原的土地利用

作者： 刘维   来源： 陕西师范大学 年份： 2009 文献类型 ： 学位论文 关键词： 清代   农业技术   土地制度   甘肃黄土高原   土地资源  

描述： ainly chooses three aspects, the quantity and quality of farmland, the land system and agricultural technology, to analysis the fact that the land system, the land utilization patterns and the selection of agricultural technology are constrained by natural environment and land resources, accordingly reveal the main-land relationship which is influenced by natural environment. The thesis is composed of four parts.

全文：本文从历史地理学的角度,探讨自然环境影响下的土地资源与土地利用和土地制度的关系。通过对甘肃黄土高原清代土地数量、质量和类型、土地制度以及农业技术选择的认识,分析说明了土地制度、土地利用方式以及

黄土高原坡耕地不同耕作模式生态效应研究

作者： 杨凯   来源： 西北农林科技大学 年份： 2009 文献类型 ： 学位论文 关键词： 耕作模式   黄土高原   坡耕地   生态效应  

描述： teau the seeding season is cold and little rainfall. Soil temperature,moisture and fertilizer is an important factor in crop yield. So in this area dissemination conservation tillage of importance. Most of former researches in comparison between conservation tillage and conventional tillage. This experimentation compare with sereval conservation tillage's difference. Through this comparison, wind-water erosion in the Loess Plateau ecologically fragile areas and application of a reasonable choice of different measures to provide a reference of farming with a view to achieving the sustainable and health development of agriculture. In this study, selection of test sites in the Loess Plateau in northern China typical wind-water erosion area Shenmu, a no-tillage, straw mulch, plastic film mulching, mulching ridge, ridge of the five kinds of different measures of conservation tillage experiment, observe ground temperature,soil nutrients,soil moisture,yeild and soil and water loss.

全文：黄土高原是我国水土流失的重灾区,而坡耕地更是保水保肥能力低下,同时黄土高原地区播种季节气温低,降雨稀少,而土壤温度、水分和养分对作物的生长和产量由有重要的影响。在该地区进行基于保护性耕作原理的农业防

干旱条件下冷型小麦的农田热量平衡及小气候特征

作者： 严菊芳   来源： 西北农林科技大学 年份： 2009 文献类型 ： 学位论文 关键词： 冷型小麦   干旱   热量平衡   小气候特征  

描述： ovement. Furthermore, analyses of adverse effects on crop growth and development can probe into the crops’ adaptability to adverse environments so as to optimize the breed selection and cultivation.

全文：,研究了干旱条件下冷型小麦的农田热量平衡及小气候特征。试验结果表明: 1.干旱条件下冷型小麦农田净辐射低于暖型小麦,午后冠顶上方0.5m和1.0m处净辐射辐照度,冷型小麦较暖型小麦分别偏低16.35

论施粥与乾隆朝的赈灾政策

作者： 左玉莲   来源： 哈尔滨师范大学 年份： 2009 文献类型 ： 学位论文 关键词： 赈灾政策   施粥   乾隆朝   评述  

描述： people's life brings great destruction and influence.

全文：清代乾隆年间水、旱、蝗、火等自然灾害频发,这些灾害给社会经济发展和人民生活带来了极大的破坏和影响。本文试图通过对这些自然灾害的状况、特点进行分析比较,探究它们的成因及其社会影响。有清一代,最重救灾

历史时期青海地区自然灾害与区域社会经济发展研究

作者： 刘雯   来源： 西北农林科技大学 年份： 2009 文献类型 ： 学位论文 关键词： 青海地区   自然灾害   历史时期   社会效应  

描述： e distinctive features in Western and Eastern of Qinghai's natural disaster in history which based on the historical materials and studied the Interaction Relationship Between the natural disasters and social-economic development, we used the theory and analysis method from the research area of disaster history and agricultural history, try to have a comprehensive investigation between the natural disasters and social-economic development in the history of Qinghai. Firstly, we divided Qinghai into two parts: the eastern and the western, under the study of the geographical features of Qinghai. We summarized the natural disaster of the eastern part mainly as flood, drought, hailstone and frost with distinctive features of variety, continuity and growth accompany while the western is mainly as earthquake and snow disaster with distinctive features of unexpected and severity. Secondly ， as the great influence on agriculture and the resulting changement in agriculture is most profound, so the progress in agriculture sciences is related to withstand the natural disaster in some ways. The paper discussed the natural disasters affected Qinghai's agriculture in history, from the aspect of seed selection 、 production 、 processing and storage to invest the development of mitigation techniques in this area. And for the livestock we investigated in two sides bred of livestock and prevention of livestock, furthermore we invested the mitigation techniques which full of geographical characteristics. Thirdly, the article investigated the relationship between natural disasters and the economic fluctuation in Qinghai from the perspective of the change in population and grain price. And then, we analyzed the influence on regional industrial structure from the aspect of expansion in rural areas, the relationship between agriculture and animal husbandry, disaster-relief crop introduction and the structure of animal species. In the view of pastoral economic exchange, we studied the interaction relationship between the natural disasters and economic development. Finally, we studied the interaction relationship between the natural disasters and social development in Qinghai. What is more, we analyzed the policy which includes grain storage, relieved and help the people in disaster , reduced taxes to control the disaster in history. We wish these could be helpful to the prevention and control of natural disasters in Qinghai today.

全文：地区自然灾害对农业发展的影响,进而探讨历史时期青海自然灾害与该地区经济和社会发展之间的互动关系。 首先,将历史时期青海地区的自然灾害分为东部和西部分别进行论述,并总结归纳出历史上青海东部以水、旱、雹、霜

甘肃黄河中上游生态环境脆弱区的保护和开发

作者： 王亚聪   来源： 西安建筑科技大学 年份： 2009 文献类型 ： 学位论文 关键词： 西部大开发   脆弱生态环境   环境伦理学   生态可持续发展  

描述： s getting worse, which threats the environment for humanity's living.

全文：的生态环境相伴生,而脆弱的生态环境区主要位于我国的大西北地区,近些年来,自然灾害时常发生,北方的沙尘暴,黄土高原的水土流失,森林的过度砍伐,土地沙漠化的扩大等等,都极大的影响了该地区的社会经济

临夏花儿与地理环境的关系

作者： 高志海   来源： 西北师范大学 年份： 2009 文献类型 ： 学位论文 关键词： 临夏   耦合关系   花儿   地理环境  

描述： cyclopedia of west China”. Being a type of non-material culture heritage shared by many nationalities, Huaer is a mark of spoken arts in west China, which is of great value for art appreciation and academic research.

全文：路2条、东南路4条)和水路3条。 第六部分,临夏花儿与地理环境的关系。临夏地处青藏高原与黄土高原的过度地带,是沟通内地同青藏高原的重要枢纽,是古丝绸之路南路的必由之路,是多民族群体和文化的汇集地,也是

临夏花儿与地理环境的关系

作者： 高志海   来源： 西北师范大学 年份： 2009 文献类型 ： 学位论文 关键词： 临夏   耦合关系   花儿   地理环境  

描述： cyclopedia of west China”. Being a type of non-material culture heritage shared by many nationalities, Huaer is a mark of spoken arts in west China, which is of great value for art appreciation and academic research.

全文：路2条、东南路4条)和水路3条。 第六部分,临夏花儿与地理环境的关系。临夏地处青藏高原与黄土高原的过度地带,是沟通内地同青藏高原的重要枢纽,是古丝绸之路南路的必由之路,是多民族群体和文化的汇集地,也是

甘南藏族自治州游牧人口定居的机制、模式和效应研究

作者： 王娟娟   来源： 兰州大学 年份： 2009 文献类型 ： 学位论文 关键词： 机制   效应   甘南   模式   游牧人口定居  

描述： f the Qingzang plateau.Gannan is adjacent to Qinghai province in west,to Sichuan province in south,to the southern of Gansu province in east and to the Loess plateau in north.Mountainous country and plateau are its major landforms types.It is a highest

全文：甘南藏族自治州地处青藏高原东北缘，属于青藏高原中部牧区与东北部农林区的过渡地带，西邻青海省，南接四川省，东部逐渐向陇南过渡，北连甘肃中部的黄土高原。全区以山地和高原地貌为主，与祁连山地一起构成甘肃省